Napoléon - Abel Gance (1927)
Director Abel Gance included a triptych sequence in 'Napoléon' (1927) that needed three screens to be properly projected
On the one hand, this would be one helluva experience, especially with the full orchestra at play. On the other hand, the 5 1/2 hour running time sounds extremely daunting.
More about Abel Gance’s Napoleon : https://youtu.be/RQyjdc5cYjk?t=29m09s
Did you think the 4Dx(somethingsomething) was new? uh?